Brake for automobiles.



No. 897,421. v PATBNTED SEPT. 1, 1908 G; STABIQES. BRAKE FORAUTOMOBILES.

APPLICATION FILED APR. 24,1907.

3 SHEETS-SHEET 1.

Enoentoi wi l'n eoaeo No. 897,421. PA'TENTED SEPT. 1, 190B. G. STABLES.

BRAKE FOR AUTOMOBILES.

APPLICATION FILED APB.24, 1907.

. 3 SHEETS-SHEET 2.

52x 8 in use UNITED STATES PATENT onrron GORDON STABLES, OF.PHILADELPHIA, PENNSYLVANIA.

BRAKE FOB AUTOMOBILES.

s ecifiacion 01 Letters Patent.

Patented Sepia-1, 1908.

Application filed April 24, 1907. Serial No. 370,009.

To all whom it may concern: I 1

Be it known that I, GORDON STABLES, a

.citizen of the United States, residing at Philadel hia, in the countyof Philadelphia, State of ennsylvania, have invented certain new anduseful Improvements in Auto- Brakes; and I do hereby declare the following to be a full, clear, .and exact description of the invention, suchas will enable others skilled in the art to which it appertains to makeand use the same.

This invention relates to new-and useful improvements in emergenc brakesfor automo iles and it has particu ar reference the brake includingmovable shoes which are designed to be en aged beneath the wheels by.

spring actuate means and to nullify the. movement of the wheels. I Inconnection with a brake .of the above type the invention aims as aprimary object to provide a novel construction, combina-' tion andarrangement of parts, the details of,

2 is a vertical transverse section showing the v floor of the vehicleand the brake parts susended therefrom, thewheels being omitted forclearness of illustration. Fig. .3 is a detailed perspective viewillustratin the cocentricpaw controlled wheel for ho ding and releasingthe spring actuated parts, together with the elements associated withandoperated by such wheel. Fig. 4 is a top plan view of one of thebrake, shoes, the entire number being counterparts in construction.Fig.5 is a side elevation'thereof, and, Fig. 6 is a detailed sectionalview illustrating the rollers mounted in the brake shoes forcounteracting the momentum of the Wheels, and the pawl and ratchetmechanism employed in connectionv with such rollers.

Referring specifically to the accompanying drawings the numeral 1designates the body of an automobile, from the floor 2 of which dependbrackets 3, the latter constituting su ports for a transverse-member 4disposed ibrwardly of the rear wheels of the vehicle and provided withrearwardly and downwardly extending Bracket bearings 5 in which a rockshaft 6 is journaled, the latter being provided at its ends withdownwardly directed cranks 7, and centrally of its length with adownwardly directed arm 8. The cranks 7 have pivotal connectionwith theside of the adjacent brake shoe 9, thelatter; being analogous to chockblocks and. having;

curved bottoms v1O between theirrsides a n at their upper ends stems 1 1Whichare loosely projected through enlarged openings? '12, I I

ormed in the members 4 adjacent thelends Forthe purpose of cushioningthethereof. 7 shoes 9 in their braking action retractile coil springs 13are connected therewith and with e members 4 and expansive coil s rings14 surround the stems 11 and with t eir ends bear'against the members 4and against pins 15 'on'saidstems. The floor 2 also su portsanupstanding bracket bearing 16in w ch is 'journaled a rock shaft 17,the latter having eccentric connection with a disk 18 having a "groovedperiphery 19. A cable 20 is fixed at a selected point onthe periphery 19and is' passed through an opening 21 in the floor 2 and over a nectionwit the central arm 8 of the shaft 6, and at its rear end is connectedto a strong retractile coil spring 23, which is in turn conneoted to astationary bracket 24. A lever 25 is fast on the shaft 17 and has a footoperated do 26 which is designed to engage the teeth 0 a quadrant'27supported from the floor 2.

The construction of the shoes 9 is illustrated more particularly inFigs. 4, 5 and 6 from which it will be noted that transverse rollers -28have theirtrunnions 29 journaled in the sides of said shoes and arerovided at one end thereof with ratchet w eels 30, pawls 31 beingpivoted to the shoes 9 for engagement therewith. As the wheels rotate Ipulley 22. The cable 20 has con- I the rollers 28 compensate for theirmovement and absorb their momentum, but the pawl and ratchet mechanismprevents rotation of, the rollers as the machine is backed to releasethe shoes 9. Said shoes are provided on their underneath surface withspurs 32 which take into the road and nullify the movement of thevehicle.

In operation, assuming that it is desired to bring the vehicle to asudden stop, the dog 26 is disengaged from the quadrant 27 at which timethe sprin 23 draws the cable 20 rearwardly, said cab e paying oif fromthe disk 18. In this action of the cable the shaft 6 is rocked and byvirtue of the connections described the shoes 9 are thrown under thewheels so that their rotation is without eflect and the vehicle comes toa sudden stop. To

release the shoes the reverse gear is thrown in at which time, owing tothe backward r0 tation of the wheels, the parts maybe restored to theirnormal positions by-pushing the lever 25 forwardly, the pawl 26preventing its escape and holding it at any position to which it may beset;

From the foregoing description it will be seen that simple and efficientmeans are provided for accomplishing the objects of the invention, but,while. the elements herein shown and described are well adapted to servethe functions set forth, it is obvious that various minor changesmay bemade in the proportions, sha e, and arrangement of the several parts,wit iout departing from the spirit and scope of the invention as definedin the appended claims. What is claimed, is: I

x 1, Abrake of the type set forth, comprising a rock shaft having cranksat'its ends,

brake shoes pivoted to said cranks, a transverse member formed withopenings, said brake shoes having stems projecting through said openingsas guides, pins carried by the stems above the transverse member, coilsprings embracing the stems and bearing against the pins and transversemember, spring actuated means for rocking said shaft,

andmeans for holding said shaft normallyagainst movement by said springactuated means. 2. A brake of the type set forth, comprising a rockshaft having cranks at its ends, brake shoes pivoted to said cranks, atransverse member formed with openings, said brake shoes having stemsprojecting through said openings as guides, spring actuated.

means for rocking said shaft to move said shoes beneath the wheels andmeans for holding said shaft normally against movement by said s ringactuated means.

3. f; brake of the type set forth, comprising a rock shaft having cranksat its ends,

brake shoes pivoted to said cranks, a transverse member formed withopenings, said brake shoeshaving stems projecting throu h said openingsas guides, pins carried byt e stems above the transverse member, coil",springs embracing the stems and bearing against the pms and transversemember, re-

GEORGE C. CUNNEY, l M. A. QUINLAN.

